Question

Ce cantitate de solutie de concentratie 1,2% se poate obtine prin dizolvarea a 12 g sare de lamaie in apa?

Answer 1

c=md*100/ms
12=12*100/ms
ms= 12*100/12
ms=100g

Answer 2

c%=1,2%
md=12g
ms=100*md/c
ms=1200/1.2
ms=1000g